Energy management system and method for hybrid electric vehicles

摘要

An energy management system includes a first energy source having a first well-to-wheels greenhouse gas emissions content, a second energy source having a second well-to-wheels greenhouse gas emissions content and a drive mechanism powered by the first energy source and the second energy source. The drive mechanism is powered by the first energy source when the first well-to-wheels greenhouse gas emissions content is less than the second well-to-wheels greenhouse gas emissions content and the drive mechanism is powered by the second energy source when the second well-to-wheels greenhouse gas emissions content is less than the first well-to-wheels greenhouse gas emissions content.